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Marine Weather and Tide Forecast for Sullivan,s Island, SC

November 10, 2024 7:28 AM EST (12:28 UTC) Change Location
Sunrise 6:44 AM   Sunset 5:22 PM
Moonrise 2:11 PM   Moonset 12:39 AM 
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NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

Marine Forecasts
   
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AMZ330 Charleston Harbor- 533 Am Est Sun Nov 10 2024

Today - NE winds 10 to 15 kt with gusts to 20 kt, becoming e.

Tonight - SE winds 5 to 10 kt, becoming S after midnight. A slight chance of showers.

Mon - SW winds 5 to 10 kt. A slight chance of showers.

Mon night - W winds 5 kt.

Tue - N winds 10 to 15 kt.

Tue night - NE winds 15 kt with gusts to 20 kt.

Wed - NE winds 15 kt.

Wed night - NE winds 10 to 15 kt.

Thu - N winds 10 kt. A slight chance of showers.

Thu night - N winds 10 to 15 kt. A slight chance of showers.
unless otherwise noted, waves 1 foot or less.
charleston harbor water temperature 72 degrees.
AMZ300 533 Am Est Sun Nov 10 2024

Synopsis for the coastal waters of south coastal south carolina and north coastal georgia - High pressure will extend across the area through Monday. A cold front will push offshore through Monday night into early Tuesday. High pressure will return again for the middle of the week.

7 Day Forecast for Marine Location Near Sullivan,s Island, SC
   
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Tide / Current for Fort Johnson, South Carolina
  
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Tide / Current data from XTide NOT FOR NAVIGATION        
Sorry tide depth graphs only, please select another station.

Fort Johnson, South Carolina, Tide feet

Tide / Current for Charleston Harbor Entrance, South Carolina Current
  
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Charleston Harbor Entrance
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Sun -- 12:38 AM EST     Moonset
Sun -- 02:29 AM EST     -0.00 knots Slack
Sun -- 05:55 AM EST     -1.83 knots Max Ebb
Sun -- 06:45 AM EST     Sunrise
Sun -- 08:58 AM EST     0.00 knots Slack
Sun -- 11:35 AM EST     1.52 knots Max Flood
Sun -- 02:11 PM EST     Moonrise
Sun -- 03:15 PM EST     -0.00 knots Slack
Sun -- 05:20 PM EST     Sunset
Sun -- 06:40 PM EST     -2.29 knots Max Ebb
Sun -- 09:47 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
        
Sorry tide depth graphs only, please select another station.

Charleston Harbor Entrance, South Carolina Current, knots
12
am
1.1
1
am
0.7
2
am
0.3
3
am
-0.4
4
am
-1.1
5
am
-1.7
6
am
-1.8
7
am
-1.5
8
am
-0.8
9
am
0
10
am
0.8
11
am
1.4
12
pm
1.5
1
pm
1.2
2
pm
0.8
3
pm
0.2
4
pm
-0.7
5
pm
-1.6
6
pm
-2.2
7
pm
-2.3
8
pm
-1.7
9
pm
-0.8
10
pm
0.2
11
pm
1.1

Area Discussion for Charleston, SC
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FXUS62 KCHS 101040 AFDCHS

Area Forecast Discussion National Weather Service Charleston SC 540 AM EST Sun Nov 10 2024

SYNOPSIS
High pressure will extend across the area through Monday. A cold front will push offshore through Monday night into early Tuesday. High pressure will return again for the middle of the week.

NEAR TERM /THROUGH TONIGHT/
The forecast is generally on track. Pops were increased to 70% across the Savannah Metro Area and nearby areas as an area of enhanced, light rainfall is moving across much of Chatham County.

Today: Part of the upper level remnants from Tropical Storm Rafael are forecast to phase with shortwave energy propagating across the Tennessee and Ohio Valleys and help to quickly erode the northern flanks of the subtropical ridge later today. At the surface, the parent high helping to reinforce the low-level wedge across the Southeast U.S. will steadily move farther offshore of the Mid-Atlantic coast thus allowing the wedge to quickly breakdown and the coastal trough lurking just offshore to move inland. Early morning isallobaric analysis shows weak pressure falls (~1mb/3hr) are already occurring within the core of the wedge, suggesting its decay is already underway. A band of isentropic lift, mainly rooted along the 295-305K surfaces, is helping to produce scattered shower activity across parts of coastal Georgia this morning. This band of isentropic forcing is forecast to push inland across much of Southeast Georgia and strengthen later this morning as winds atop the decaying wedge veer more southeasterly with time and interact with a ribbon of PWATs nearing 2". This should result in an uptick in shower activity after daybreak with a large northwest and southeast oriented area of scattered to numerous showers impacting a good portion of Southeast Georgia. Pops were raised to 50-60% later this morning into early afternoon for much of Southeast Georgia.

Isentropic ascent is forecast to weak later this afternoon as both the wedge and coastal trough wash out, but some degree of shower activity is likely to persist. Rain chances will likely drop off pretty quickly north of the Savannah River with rain chances across Southeast South Carolina only averaging 20-30% for the counties bordering the Savannah River. Rain-free conditions should persist across the Charleston Tri-County area.
Highs will peak in the mid-upper 70s, warmest east of I-95 and away from the beaches, with lower 70s in the Millen-Allendale corridor.

Tonight: The primary corridor of weak 295-305K isentropic ascent will shift into interior Southeast South Carolina overnight as the wedge completely dissipates and the nose of a 130 kt subtropical jet propagates in from the west. A risk for isolated to scattered showers will persist, mainly focusing across Southeast South Carolina into the early morning hours on Veteran's Day. It will an unseasonably warm night with lows only dropping into the lower-mid 60s well inland to around 70 at the beaches and Downtown Charleston. As shower activity exits Southeast Georgia later in the evening, there will be a risk for low stratus and fog. The fog could become locally dense after midnight, especially across the interior.

SHORT TERM /MONDAY THROUGH WEDNESDAY/
Monday: The mid-levels will consist of zonal flow over our region in the morning. Though, as we go into the overnight hours, troughing forms off the East Coast, while ridging forms over the Central U.S. At the surface, weak troughing should be located to our north in the morning, while a cold front is over the spine of the Appalachians. The cold front will quickly approach our area, moving through late in the afternoon or during the evening, then shifting offshore overnight. A decent amount of moisture will be spread across the region ahead of the front, with PWATs approaching 1.75". Both the synoptic models and long-range CAMs point towards isolated showers across most of our area in the morning, with scattered coverage generally across the Charleston Tri-County. Coverage and intensity trends lower into the afternoon, with the evening and overnight being dry. Overall, QPF should be minimal. We initially had slight chance to chance POPs in the morning, but those got grids got wiped out following overnight coordination with CAE. So now we only have slight chance POPs, which may be too low across the Charleston Tri- County. But at least the grids are coordinated and look good. Temperatures really warm up just ahead of the front due to southwest surface winds and more sun than clouds in the afternoon. Highs should reach around 80 degrees. Lows will be mild, ranging from the mid 50s far inland to the mid 60s near the beaches.

Tuesday and Wednesday: The mid-levels will consist of a trough off the East Coast and a ridge over the Central U.S. Tuesday morning. The ridge will strengthen/amplify and move eastward, pushing the trough further offshore. The ridge is expected to be over the East Coast by late Wednesday. At the surface, High pressure will be centered near the Great Lakes Region Tuesday morning. It will shift northeastward, becoming located north of New England by late Wednesday. However, its southern periphery will reach all of the way into our region. This will bring our area dry conditions. Northeast surface winds will usher cooler temperatures into our area. But they may not reach our area until late Tuesday. For this reason, we still have highs a few degrees above normal on Tuesday. Mostly clear skies Tuesday night will yield lows from the lower to middle 40s far inland, to the lower to middle 50s along the immediate coast. Highs Wednesday should be below normal for a change, generally in the 60s across much of our area under mostly sunny skies.

LONG TERM /WEDNESDAY NIGHT THROUGH SATURDAY/
High pressure will prevail well to our northeast through Thursday morning, bringing dry weather and high temperatures near normal. A cold front should quickly move through our area late Thursday. Models are mixed on whether it'll be dry or bring a decent amount of rain. But the NBM and our forecast is leaning dry. High pressure and dry conditions return Friday into Saturday. High temperatures should be near normal both of these days.

AVIATION /12Z SUNDAY THROUGH THURSDAY/
10/12z TAF Discussion: KCHS/KJZI: VFR through the 12z TAF period. Isolated showers could get close to the terminals later this evening, but confidence for impacts is not high enough to include a mention at this time.

KSAV: MVFR cigs will persist through late morning before improving to VFR this afternoon. A cluster of showers will continue to push across the terminal through about 13z. Vsbys will generally run 4-6SM as these showers move through. The main band of showers that is expected to develop later this morning should stay south of the terminal, but could be close enough to justify a VCSH through late morning/early afternoon. MVFR cigs will redevelop this evening with a possibility for IFR or lower conditions occurring early Monday morning as low clouds and fog develop. The better fog chances look to remain just west and southwest of the terminal. Cigs were limited to MVFR for now with no mention of fog at this time as a result. This will be reevaluated for the 18z TAFs.

Extended Aviation Outlook: Brief flight restrictions are possible early Monday due to showers. Otherwise, VFR should prevail.

MARINE
Today: Conditions will begin to improve across the waters today as the pressure gradient relaxes in response to the weakening of the inland wedge. Easterly winds will settle into the 15-20 kt range later today with seas subsiding to 4-6 ft across the waters out 20 NM and 6-8 ft over the Georgia waters out 20-60 NM. Small Craft Advisories continue for all legs except the Charleston Harbor.

Tonight: Winds will quickly veer southerly tonight with speeds dropping to 15 kt or less. Seas look to drop below 6 ft by early evening across the nearshore waters out 20 NM, but will remain above 6 ft over the Georgia waters out 20-60 NM where the Small Craft Advisory will continue through the night.

Monday: A cold front will quickly approach our area from the west and northwest during the day, moving through our waters during the evening, and then offshore overnight. We'll have a Small Craft Advisory in effect for the GA waters beyond 20 nm through the afternoon due to seas. This is expected to expire when seas lower into the evening. The front won't cause winds or seas to be high enough to prompt additional Small Craft Advisories.

Tuesday and Wednesday: Surface High pressure will be centered near the Great Lakes Region Tuesday morning. It will shift northeastward, becoming located north of New England by Wednesday night. The combination of an enhanced pressure gradient and strong cold air advection will yield elevated winds and seas Tuesday night into Wednesday morning. Small Craft Advisories will be needed for all of our ocean zones during this time period, and possibly the Charleston Harbor. Conditions improve Wednesday evening and overnight.

Thursday: A cold front should quickly move through our area late. It doesn't appear that the front will cause winds or seas to be high enough to prompt Small Craft Advisories.

CHS WATCHES/WARNINGS/ADVISORIES
GA...None.
SC...None.
MARINE...Small Craft Advisory until 4 PM EST this afternoon for AMZ350- 352.
Small Craft Advisory until 7 PM EST this evening for AMZ354.
Small Craft Advisory until 4 PM EST Monday for AMZ374.


Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
CHTS1 1 mi70 minNE 14G16 65°F 72°F30.22
41029 - Capers Nearshore (CAP 2) 15 mi80 minESE 12G16 72°F 71°F30.2065°F
41065 16 mi78 min 71°F4 ft
41066 21 mi80 minESE 19G25 74°F 73°F30.1865°F
41076 21 mi63 min 6 ft
ACXS1 - ACE Basin Reserve, SC 32 mi103 minN 2.9 66°F 30.1863°F
41033 43 mi80 minE 16G21 73°F 72°F30.1669°F
41067 43 mi68 min 72°F7 ft
41004 - EDISTO - 41 NM Southeast of Charleston, SC 47 mi48 minE 16G21 74°F 80°F30.1965°F


Wind History for Charleston, SC
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Airport Reports
   
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KJZI CHARLESTON EXECUTIVE,SC 7 sm13 minN 068 smMostly Cloudy63°F61°F94%30.21
KCHS CHARLESTON AFB/INTL,SC 11 sm32 minNNE 1010 smOvercast61°F57°F88%30.22
KLRO MT PLEASANT RGNLFAISON FIELD,SC 11 sm13 minN 00G104 smMostly Cloudy Mist 61°F61°F100%30.22

Weather Map
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GEOS Local Image of Southeast  
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Charleston, SC,





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